1 package org.apache.turbine.services.jsp.util;
2
3
4 import org.apache.logging.log4j.LogManager;
5
6 /*
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements. See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership. The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License. You may obtain a copy of the License at
14 *
15 * http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied. See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 */
24
25
26 import org.apache.logging.log4j.Logger;
27 import org.apache.turbine.modules.Screen;
28 import org.apache.turbine.modules.ScreenLoader;
29 import org.apache.turbine.services.TurbineServices;
30 import org.apache.turbine.services.assemblerbroker.AssemblerBrokerService;
31 import org.apache.turbine.services.template.TemplateService;
32 import org.apache.turbine.util.RunData;
33
34 /**
35 * Returns output of a Screen module. An instance of this is placed in the
36 * request by the JspLayout. This allows template authors to
37 * place the screen template within the layout.<br>
38 * Here's how it's used in a JSP template:<br>
39 * <code>
40 * <%useBean id="screen_placeholder" class="JspScreenPlaceholder" scope="request" %>
41 * ...
42 * <%= screen_placeholder %>
43 * </code>
44 *
45 * @author <a href="john.mcnally@clearink.com">John D. McNally</a>
46 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
47 * @version $Id: JspScreenPlaceholder.java 1854688 2019-03-03 10:36:42Z tv $
48 */
49 public class JspScreenPlaceholder
50 {
51 /** Logging */
52 private static Logger log = LogManager.getLogger(JspNavigation.class);
53
54 /* The RunData object */
55 private final RunData data;
56
57 private final ScreenLoader screenLoader;
58
59 /**
60 * Constructor
61 *
62 * @param data A Rundata Object
63 */
64 public JspScreenPlaceholder(RunData data)
65 {
66 this.data = data;
67 AssemblerBrokerService./../org/apache/turbine/services/assemblerbroker/AssemblerBrokerService.html#AssemblerBrokerService">AssemblerBrokerService abs = (AssemblerBrokerService)TurbineServices.getInstance()
68 .getService(AssemblerBrokerService.SERVICE_NAME);
69 this.screenLoader = (ScreenLoader)abs.getLoader(Screen.class);
70 }
71
72 /**
73 * builds the output of the navigation template
74 */
75 public void exec()
76 {
77 String template = null;
78 String module = null;
79 try
80 {
81 template = data.getTemplateInfo().getScreenTemplate();
82 TemplateServiceorg/apache/turbine/services/template/TemplateService.html#TemplateService">TemplateService templateService = (TemplateService)TurbineServices.getInstance().getService(TemplateService.SERVICE_NAME);
83 module = templateService.getScreenName(template);
84 screenLoader.exec(data, module);
85 }
86 catch (Exception e)
87 {
88 String message = "Error processing screen template:" +
89 template + " using module: " + module;
90 log.error(message, e);
91 try
92 {
93 data.getResponse().getWriter().print(message);
94 }
95 catch (java.io.IOException ioe)
96 {
97 // ignore
98 }
99 }
100 }
101 }